We think you have liked this presentation. If you wish to download it, please recommend it to your friends in any social system. Share buttons are a little bit lower. Thank you!
Presentation is loading. Please wait.
Published byRichard Cross
Modified over 2 years ago
Theory of Plate Tectonics Plate Tectonics Plate Boundaries Causes of Plate Tectonics
What is Plate Tectonics The Earths crust and upper mantle are broken into sections called plates Plates move around on top of the mantle like rafts
What is the Lithosphere? The crust and part of the upper mantle = lithosphere –100 km thick –Less dense than the material below it so it floats
What is the Asthenoshere? The plastic layer below the lithosphere = asthenosphere The plates of the lithosphere float on the asthenosphere
2 Types of Plates Ocean plates - plates below the oceans Continental plates - plates below the continents
Questions... What is the theory of plate tectonics? What is the lithosphere? What is the asthenosphere? What is the connection between the two? What are the two types of plates?
Divergent Boundaries Boundary between two plates that are moving apart or rifting RIFTING causes SEAFLOOR SPREADING
Features of Divergent Boundaries Mid-ocean ridges rift valleys fissure volcanoes
Convergent Boundaries Boundaries between two plates that are colliding There are 3 types…
Type 1 Ocean plate colliding with a less dense continental plate Subduction Zone: where the less dense plate slides under the more dense plate VOLCANOES occur at subduction zones
Andes Mountains, South America
Type 2 Ocean plate colliding with another ocean plate The less dense plate slides under the more dense plate creating a subduction zone called a TRENCH
Aleutian Islands, Alaska
Type 3 A continental plate colliding with another continental plate Have Collision Zones: –a place where folded and thrust faulted mountains form.
Transform Fault Boundaries Boundary between two plates that are sliding past each other EARTHQUAKES along faults
San Andreas Fault, CA
Questions... What are the three types of boundaries? What direction do plates go for each? Which boundary has a subduction zone…what occurs at a subduction zone?
Causes of Plate Tectonics
Convection Currents Hot magma in the Earth moves toward the surface, cools, then sinks again. Creates convection currents beneath the plates that cause the plates to move.
Questions... What causes plates to move? How is a convection current formed?
Plate Tectonics. Brief Structure of the Earth Divided into layers: –Core, mantle, crust.
The Theory of Plate Tectonics. Plate Tectonics Plate tectonics is the theory that explains why and how continents move. By the 1960s evidence supported.
The Structure of the Earth and Plate Tectonics. Structure of the Earth The Earth is made up of 3 main layers: –Core –Mantle –Crust Inner core Outer core.
Do Now # 4 What is the difference between convergent, divergent, and transform boundaries?
Plate Tectonics 6.E.2.2 Explain how crustal plates and ocean basins are formed, move and interact using earthquakes, heat flow and volcanoes to reflect.
1.How do the rocks of the crust and lithosphere compare? Rocks in the crust are less dense and made mainly of granite. The rocks in the lithosphere are.
Earths Crust Convection currents Continental drift – idea that continents have moved slowly to their current positions due to convection currents in.
Plate Movement and Plate Boundaries Chapter 4, Section 3.
Choose a category. You will be given the answer. You must give the correct question. Click to begin.
Warm Up 11/ What hypothesis states that the continents were once joined to form a single supercontinent? a. continental driftc. plate tectonics.
Copyright © Houghton Mifflin Company. All rights reserved. Essentials of Geology, 1b–1 Plate Tectonics A geological theory that states that pieces of Earth’s.
Plate Tectonics What evidence do scientists have to support the fact that the Earths crust is continuously moving?
Topic: Earth’s Features Essential Question: What crustal features are created by the movement of Earth’s plates?
Chapter 8: Plate TectonicsChapter 8: Plate Tectonics 8.1: Earth has several layers 8.2: Continents change position over time 8.3: Plates move apart 8.4:
How Do Earths Plates Move? Chapter 1, Section 2, pD14-19.
Mr. Russo Beaumont High School Divergent boundary Convergent boundary Transform fault boundary Oceanic Ridge Rift Valley Seafloor Spreading.
The Theory of Plate Tectonics. The lithosphere is divided into separate sections called plates. The plates carry continents and ocean crust or both.
What do you already know? What do you want to learn? SEEC Ecuador 2010 Presentation by: Mary D. Curtis Brittany L. Heller iwith.org.
Imagine the Earth as a hardboiled egg……………………. The thin brittle shell is the crust that humans live on. The thick jelly like white is the deep hot magma.
Changes to Earth’s Surface Chapter 6. Prior Knowledge What are the layers of the Earth? What are the layers of the Earth? What causes Earth’s surface.
Plate Tectonics. The Earth's surface is made up of a series of large plates (like pieces of a giant jigsaw puzzle). These plates are in constant motion.
Continental Drift Chapter 10 Section 1. Continental Puzzle Do the continents fit together perfectly? What continents fit the best? What other information.
Ch 7: Plate Tectonics A work in progress …. Animation of Continental Drift pangea moving Pangea w/ labels PANGAEA: – Name of a supercontinent. – All continents.
Some questions we will answer today: –How is the earth always changing? –What forces inside the earth create and change landforms on the surface? –What.
Plate Tectonics and Earthquakes Objectives: Students will learn key terms associated with Students will learn key terms associated with plate tectonic.
Unit D Test Review Howard Middle School 6 th Grade Earth Science.
Plate Tectonics Lynn Hahn. Tectonic Plate Theory Theory that explains the movement of continents across the globe. It explains why some earthquakes occur.
Plate Tectonics Continental Drift Theory Theory of Plate Tectonics Plate Boundaries.
Plate Tectonics. The youngest material on the ocean floor is found where plates move apart. On which of the following structures is it usually found?
What Are Earths Layers Unit D, Chapter 1, Lesson 1, pD6-11.
© 2017 SlidePlayer.com Inc. All rights reserved.